Capacity-maximizing transmitter processing for fading matrix channels

Author

Reial, Andres ; Wilson, Stephen G.

Author_Institution

Dept. of Electr. Eng., Virginia Univ., Charlottesville, VA, USA

fYear

1999

fDate

6-10 Jun 1999

Firstpage

6

Lastpage

10

Abstract

The performance potential of a wireless communications system employing antenna arrays is not fully utilized if equal energy allocation and uncorrelated symbols are used at all transmitters in the multichannel, cross-coupled system. Optimal, in the information-theoretic sense, transmitted signal covariance can be found by maximizing the end-to-end system capacity subject to an energy constraint. Performance evaluation of system outage capacity shows that optimal transmitter processing offers an SNR improvement potential up to several dB. The gains are most notable for systems with low SNR or many transmit antennas

Keywords

antenna arrays; array signal processing; channel capacity; covariance matrices; fading channels; optimisation; signal synthesis; transmitting antennas; SNR; antenna arrays; capacity-maximizing transmitter processing; covariance matrix; end-to-end system capacity; energy constraint; equal energy allocation; fading matrix channels; information theory; multichannel cross-coupled system; optimal transmitter processing; performance; performance evaluation; signal design; system outage capacity; transmit antennas; transmitted signal covariance; uncorrelated symbols; wireless communications system; Additive noise; Array signal processing; Communication system control; Covariance matrix; Fading; Gaussian noise; Process control; Rician channels; Transmitters; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Theory Mini-Conference, 1999

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-5653-5

Type

conf

DOI

10.1109/CTMC.1999.790227

Filename

790227